意群训练:Thus, for instance, it may come as a shock to mathematiians to learn that the Schrodinger equation for the hydrogen atom is not a literally correct description of this atom, but only an approximation to a somewhat more correct equation taking account of spin, magnetic dipole, and ...
The initial step is exfoliation of the commercial expandable graphite (160–50N, Grafguard) by brief (60s) heatingto10008Cinforminggas(i.e.hydrogenandnitrogen), followed by reintercalation by oleum (fuming sulfuric acid with 20% free SO3), and insertion of tetrabutylammonium hydroxide (TBA, 40...
A1st level packaging 第一级封装2nd level packaging 第二级封装aberration 象差色差absorption 吸收acceleration column 加速管acceptor 受主Accumul
equation equations equilibrium equipment equipped equity equivalent er era eric ericsson erik erotic erotica erp error errors es escape escort escorts especially espn essay essays essence essential essentially essentials essex est establish established establishing establishment estate estates estimate estimated est...
hydrogen72293.858.76 ammonia370293.159.82 sulfur dioxide 416 293.6512.54 helium79.427319 Viscosity of a dilute gas The Chapman-Enskog equation may be used to estimate viscosity for a dilute gas. This equation is based on semi-theorethical assumption by Chapman and Enskoq. The equation requires th...
Compression fittings may be used only to connect instrumentation and pressure-relief devices to the gas lines. The materials used in valves and fittings shall be suitable for liquid hydrogen service over the service temperature range. Bayonet joints shall be used for transfer operations of liquid ...
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bycarefulheatingofammoniumnitrate.BalancedEquationReactionEvidence4.Hydrogensulfidegasisresponsiblefortheodorofrotteneggs.Hydrogensulfideburnsinair,producingsulfurdioxidegasandwatervapor.BalancedEquationReactionEvidence5.Whensulfuricacidisaddedtosolidsodiumchlorideandthemixtureisheated,hydrogenchloridegasisgenerated,leaving...
hydrogen n.氢 1907. I pron.(主格)我 1908. ice n.冰,冰块 vt.冰镇 1909. ice-cream n.冰淇淋 1910. idea n.想法;思想;意见 1911. ideal a.理想的;观念的 1912. identical a.完全相同的;同一的 1913. identify vt.认出,识别,鉴定 1914. idiom n.习语,成语 1915. idle a.空闲的;懒散的 1916....
Atoms of hydrogen are fused to make helium. 氢原子可熔合成氦。 Helium is a gas used in balloons. 氦是一种用于气球的气体。 原声例句 He also invented the Skyhook, an air rescue system that involved an airplane and a large helium balloon. VOA : special.2009.01.14 z So, this is what we...